Received: 18 November 2020
Accepted: 8 March 2021
First Online: 20 March 2021
: This study was performed in accordance with the Declaration of Helsinki. The medical ethics committee of the Leiden University Medical Center approved the study (Protocol nr. P17.165). Written informed consent was obtained from all participants before taking part in the interview.
: Not applicable.
: The authors declare no conflict of interest.